Highlights
· The NOAA weekly rainfall forecast predicts up to
200 mm of total rainfall in Jaffna district during 23 – 28 Oct.
· Between 16 – 22 Oct: up to 140 mm of daily
rainfall was recorded in Kilinochchi district on the 22nd.
· From 15 – 21 Oct: up to 5 km/h, southeasterly
winds were experienced by the entire island
· 0.5 0C above-average sea surface temperature was
observed in the seas around Sri Lanka.
· The NOAA weekly rainfall forecast predicts up to
200 mm of total rainfall in Jaffna district during 23 – 28 Oct.
· Between 16 – 22 Oct: up to 140 mm of daily
rainfall was recorded in Kilinochchi district on the 22nd.
· From 15 – 21 Oct: up to 5 km/h, southeasterly
winds were experienced by the entire island
· 0.5 0C above-average sea surface temperature was
observed in the seas around Sri Lanka.
Monitoring
Rainfall
Weekly Monitoring:
Date
Rainfall
16th October
Up to 70 mm in Mullaitivu and Vavuniya districts; up to 60 mm in
Mannar and Anuradhapura districts; up to 50 mm in Trincomalee, Puttalam,
Kurunegala, Matale, Kandy and Badulla districts; up to 30 mm in Kilinochchi,
Polonnaruwa, Ampara and Ratnapura districts; and up to 20 mm in Jaffna,
Batticaloa, Gampaha, Colombo, Kalutara, Galle, Matara, Hambantota, Nuwara
Eliya and Monaragala districts.
17th October
Up to 50 mm in
Mannar, Vavuniya, Anuradhapura, Puttalam, Kurunegala, Matale, Polonnaruwa and
Badulla districts; up to 30 mm in Jaffna, Mullaitivu, Kandy, Nuwara Eliya and
Ratnpura districts; and up to 20 mm in Kilinochchi, Trincomalee, Kegalle,
Kalutara. Gampaha, Matara, Hambantota and Monaragala districts.
18th October
Up to 50 mm in Gampaha and Kegalle districts; up to 30 mm in
Puttalam, Kurunegala, Colombo, Kalutara and Ratnapura districts; and up to 20
mm in Matale, Kandy, Nuwara Eliya and Badulla districts.
19th
October
Up to 60 mm
in Colombo and Galle districts; up to 50 mm in Puttalam, Kurunegala,
Anuradhapura, Ratnapura, Kalutara and Matara districts; up to 30 mm in
Matale, Kegalle, Monaragala and Hambantota districts; and up to 20 mm Vavuniya,
Jaffna, Kilinochchi, Polonnaruwa, Ampara, Kandy, Nuwara Eliya, Badulla and
Ampara districts.
20th
October
Up to 60 mm in Puttalam, Kurunegala and Gampaha districts; up to 50
mm in Jaffna, Anuradhapura, Matale, Kegalle, Colombo and Ratnpura districts;
up to 30 mm in Kilinochchi, Mullaitivu, Vavuniya, Mannar, Batticaloa, Kandy,
Nuwara Eliya, Galle and Matara districts; and up to 20 mm Trincomalee,
Polonnaruwa, Ampara, Badulla, Monaragala and Hambantota districts.
21st
October
Up to 120 mm
in Batticaloa and Ampara districts; up to 70 mm in Monaragala, Galle and
Ratnapura districts; up to 60 mm in Mannar, Kalutara and Polonnaruwa
districts; up to 50 mm in Puttalam, Kurunegala, Gampaha, Kegalle, Kandy,
Nuwara Eliya, Badulla and Matara districts; up to 30 mm in Jaffna, Kilinochchi,
Mullaitivu, Vavuniya, Anuradhapura, Trincomalee, Matale and Hambantota
districts; and up to 20 mm in rest of the island.
22nd
October
Up to 140 mm in Kilinochchi district; up to 120 mm in Mannar
district; up to 60 mm in Mullaitivu district; up to 50 mm in Jaffna, Vavuniya
and Ratnapura districts; up to 30 mm in Puttalam and Anuradhapura districts;
and up to 20 mm in Trincomalee, Kurunegala, Nuwara Eliya, Galle and Matara
districts.
Total Rainfall for the Past Week: The RFE 2.0 tool shows total up to 150-200 mm in Puttalam,
Kurunegala, Anuradhapura, Gampaha, Colombo, Kalutara. Kegalle and Ratnapura
districts; up to 100-150 mm in Galle, Matara, Nuwara Eliya, Kandy, Polonnaruwa,
Ampara, Badulla and Monaragala districts; and up to 50-75 mm in rest of the
island. Above-average rainfall up to 100-200 mm is shown for Ampara district;
up to 50-100 mm in Puttalam, Kurunegala, Anuradhapura. Matale, Gampaha, Colombo,
Kalutara, Kegalle, Ratnapura, Monaragala, Badulla and Batticaloa districts; and
up to 25-50 mm in most parts of the island.
Monthly Monitoring: During September – Above average rainfall conditions
up to 450 mm were experienced by Gampaha district; up to 360 mm in Puttalam,
Colombo, Kalutara, Galle, Matara, Hambantota, Monaragala and Ratnapura
districts; up to 240 mm in Kurunegala, Kegalle, Jaffna, Kilinochchi, Vavuniya,
Anuradhapura, Trincomalee, Polonnaruwa, Batticaloa, Badulla, Ampara, Kandy and
Nuwara Eliya districts; and up to 120 mm in rest of the island. The CPC Unified
Precipitation Analysis tool shows up to 750 mm of total rainfall in Gampaha,
Colombo, Kalutara, and Galle districts; up to 500 mm in Kurunegala, Puttalam,
Kegalle, Ratnapura, Matara, Hambantota and Monaragala districts; up to 300 mm in
Nuwara Eliya and Badulla districts; and up to 200 mm in Kandy, Matale, Ampara
and Batticaloa districts.
Weekly Monitoring:
Date
|
Rainfall
|
16th October
|
Up to 70 mm in Mullaitivu and Vavuniya districts; up to 60 mm in
Mannar and Anuradhapura districts; up to 50 mm in Trincomalee, Puttalam,
Kurunegala, Matale, Kandy and Badulla districts; up to 30 mm in Kilinochchi,
Polonnaruwa, Ampara and Ratnapura districts; and up to 20 mm in Jaffna,
Batticaloa, Gampaha, Colombo, Kalutara, Galle, Matara, Hambantota, Nuwara
Eliya and Monaragala districts.
|
17th October
|
Up to 50 mm in
Mannar, Vavuniya, Anuradhapura, Puttalam, Kurunegala, Matale, Polonnaruwa and
Badulla districts; up to 30 mm in Jaffna, Mullaitivu, Kandy, Nuwara Eliya and
Ratnpura districts; and up to 20 mm in Kilinochchi, Trincomalee, Kegalle,
Kalutara. Gampaha, Matara, Hambantota and Monaragala districts.
|
18th October
|
Up to 50 mm in Gampaha and Kegalle districts; up to 30 mm in
Puttalam, Kurunegala, Colombo, Kalutara and Ratnapura districts; and up to 20
mm in Matale, Kandy, Nuwara Eliya and Badulla districts.
|
19th
October
|
Up to 60 mm
in Colombo and Galle districts; up to 50 mm in Puttalam, Kurunegala,
Anuradhapura, Ratnapura, Kalutara and Matara districts; up to 30 mm in
Matale, Kegalle, Monaragala and Hambantota districts; and up to 20 mm Vavuniya,
Jaffna, Kilinochchi, Polonnaruwa, Ampara, Kandy, Nuwara Eliya, Badulla and
Ampara districts.
|
20th
October
|
Up to 60 mm in Puttalam, Kurunegala and Gampaha districts; up to 50
mm in Jaffna, Anuradhapura, Matale, Kegalle, Colombo and Ratnpura districts;
up to 30 mm in Kilinochchi, Mullaitivu, Vavuniya, Mannar, Batticaloa, Kandy,
Nuwara Eliya, Galle and Matara districts; and up to 20 mm Trincomalee,
Polonnaruwa, Ampara, Badulla, Monaragala and Hambantota districts.
|
21st
October
|
Up to 120 mm
in Batticaloa and Ampara districts; up to 70 mm in Monaragala, Galle and
Ratnapura districts; up to 60 mm in Mannar, Kalutara and Polonnaruwa
districts; up to 50 mm in Puttalam, Kurunegala, Gampaha, Kegalle, Kandy,
Nuwara Eliya, Badulla and Matara districts; up to 30 mm in Jaffna, Kilinochchi,
Mullaitivu, Vavuniya, Anuradhapura, Trincomalee, Matale and Hambantota
districts; and up to 20 mm in rest of the island.
|
22nd
October
|
Up to 140 mm in Kilinochchi district; up to 120 mm in Mannar
district; up to 60 mm in Mullaitivu district; up to 50 mm in Jaffna, Vavuniya
and Ratnapura districts; up to 30 mm in Puttalam and Anuradhapura districts;
and up to 20 mm in Trincomalee, Kurunegala, Nuwara Eliya, Galle and Matara
districts.
|
Predictions
Rainfall
14-day prediction:NOAA NCEP models:
From 23rd – 29th Oct: Total rainfall more than 135 mm in Jaffna, Kilinochchi, Mullaitivu, Mannar, Vavuniya, Anuradhapura, Polonnaruwa, Batticaloa. Puttalam and Kurunegala districts; up to 115-125 mm in Gampaha, Colombo, Matale, Kegalle, and Ratnapura districts; and up to 95-105 mm in Ampara, Kandy, Galle and Matara districts.
From 30th Oct – 5th Nov: Total rainfall more than 135 mm in Puttalam, Kurunegala, Gampaha, Colombo, Mannar, Kilinochchi and Jaffna districts; up to 125-135 mm Vavuniya, Anuradhapura, Matale, Kandy, Kegalle, Ratnapura, Galle and Matara districts; and up to 105-115 mm in Trincomalee and Polonnaruwa districts.
IMD NCMWRF Forecast:
From 23rd – 28th Oct: Total rainfall up to 200 mm is expected in Jaffna district; up to 150 mm in Kilinochchi, Mannar, Mullaitivu, Vavuniya, and Trincomalee districts; up to 100 mm in Puttalam, Anuradhapura, Batticaloa. Ampara, Monaragala and Hambantota districts; and up to 75 mm in rest of the island.
For the next 15 days:
MJO shall enhance the rainfall in Sri Lanka in the
next 10 days and shall suppress in the following 5 days.
Ocean State (Text Courtesy IRI)
Pacific sea state: October 18, 2019
SSTs in the east-central Pacific maintained ENSO-neutral levels during September and early October, despite some warming in October. Patterns in some atmospheric variables show weak El Niño conditions, but this is attributed to intraseasonal variability and the collective assessment is for ENSO-neutral conditions. Model forecasts generally favor ENSO-neutral through autumn, winter, and spring, with slightly higher chances for El Niño than La Niña. The official CPC/IRI outlook is consistent with these model forecasts.
SSTs in the east-central Pacific maintained ENSO-neutral levels during September and early October, despite some warming in October. Patterns in some atmospheric variables show weak El Niño conditions, but this is attributed to intraseasonal variability and the collective assessment is for ENSO-neutral conditions. Model forecasts generally favor ENSO-neutral through autumn, winter, and spring, with slightly higher chances for El Niño than La Niña. The official CPC/IRI outlook is consistent with these model forecasts.
Indian Ocean State
0.5 0C above-average sea surface the temperature was observed in the seas around Sri Lanka.
0.5 0C above-average sea surface the temperature was observed in the seas around Sri Lanka.